The Dark Times was one of the earliest aeons in the history of the Universe.
The Tenth Doctor described this as a time of chaos "before our reality" when the Nestenes and Great Vampires flourished, (TV: The Infinite Quest) as well as the Carrionites (TV: The Shakespeare Code) and the Racnoss, the last-named species having its defeat at the hands of the Fledgling Empires. (TV: The Runaway Bride) The Mandragora Helix also originated during this period. (PROSE: Beautiful Chaos) The Carrionites waged a war with the Hervoken. (PROSE: Forever Autumn) Krafayis evolved and began to swarm across the Universe towards the end of this period. (TV: Vincent and the Doctor) The Great Old Ones were also present in the Universe at this time. It was during this time period, too, that the legendary spaceship Infinite was created. (TV: The Infinite Quest)
The Time Lords fought the Great Vampires during this time and, led by Rassilon, they made Bowships to kill the beasts. They killed all but one after a war so long and bloody that the Time Lords were sickened of violence and officially began their long period of non-interference. (TV: State of Decay)
When the Dark Times actually occurred was not known. The Tenth Doctor implied that the Dark Times ended with the destruction of the Racnoss, which occurred 4.6 billion years before the 21st century. (TV: The Runaway Bride) On the other hand, the war between the Hervoken and the Carrionites was said to occur a mere million years before then. (PROSE: Forever Autumn)
- The Whoniverse - History of the Whoniverse: Event One onwards (A history from Pre-Universe to the creation of the Earth)
- RASSILON, OMEGA and that OTHER Guy - The Dark Time: Event Zero and Ancient Gallifrey (A history from Pre-Universe to the creation of the prototype Hand of Omega)